VB.NET

Find a Label ID by Name

See more GMail REST API Examples

Lookup the ID of a GMail label by the label name. VB.NET

Dim success As Boolean = False

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim http As New Chilkat.Http
http.AuthToken = "GMAIL-ACCESS-TOKEN"

Dim userId As String = "me"
http.SetUrlVar("userId",userId)

Dim url As String = "https://www.googleapis.com/gmail/v1/users/{$userId}/labels"

' Get the list of GMail labels as JSON.
Dim sb As New Chilkat.StringBuilder
success = http.QuickGetSb(url,sb)
If (success <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim json As New Chilkat.JsonObject
json.LoadSb(sb)
json.EmitCompact = False
Debug.WriteLine(json.Emit())

If (http.LastStatus <> 200) Then
    Debug.WriteLine("Failed.")
    Exit Sub
End If


' The JSON returned looks like this:
' {
'   "labels": [
'     {
'       "id": "Label_5",
'       "name": "QA",
'       "messageListVisibility": "show",
'       "labelListVisibility": "labelShow",
'       "type": "user"
'     },
'     {
'       "id": "Label_21",
'       "name": "[Gmail]/testFolder",
'       "type": "user"
'     },
'     {
'       "id": "CATEGORY_PERSONAL",
'       "name": "CATEGORY_PERSONAL",
'       "type": "system"
'     },
' 	...

' The name of the label is generally known because it's what we visually see.
' The id is what we need to get.  Assuming the name is unique,
' find the JSON record having name=<desired name>
' For example...
Dim jRecord As Chilkat.JsonObject = json.FindRecord("labels","name","QA",False)
If (json.LastMethodSuccess = True) Then
    Debug.WriteLine("The id of QA is: " & jRecord.StringOf("id"))

End If


jRecord = json.FindRecord("labels","name","[Gmail]/testFolder",False)
If (json.LastMethodSuccess = True) Then
    Debug.WriteLine("The id of [Gmail]/testFolder is: " & jRecord.StringOf("id"))

End If


jRecord = json.FindRecord("labels","name","questions",False)
If (json.LastMethodSuccess = True) Then
    Debug.WriteLine("The id of questions is: " & jRecord.StringOf("id"))

End If


' Output:

' The id of QA is: Label_5
' The id of [Gmail]/testFolder is: Label_21
' The id of questions is: Label_43